Multiple Reflections in Acoustic Surface Wave Reflective Arrays

The effects of multiple reflections in two-dimensional acoustic surface wave reflective arrays are examined via a computa- tional model which accounts for all multiple reflections. A weak re- flection unit cell scattering matrix is developed in detail for scattering on an anisotropic surface. Several reflecting geometries are solved for the weak reflection case providing a comparative basis against which the distortions of frequency responses and spatial beam pro- files induced by multiple reflections are compared. By comparing computed frequency responses and beam profiles to experiment, it is found that single reflector scattering coefficients can be deduced. I. INTRODUCTIOK